fix: fixed analyzer issues and merge conflicts

lib/features/diary/presentation/widgets/add_product_button_widget.dart

@@ -21,7 +21,7 @@ class _AddProductButtonWidgetState extends State<AddProductButtonWidget> {
     diaryCubit = context.read<DiaryCubit>();
   }
 
-  addProductInMeal(DiaryStateLoaded state, [int? portionId]) {
+  Future addProductInMeal(DiaryStateLoaded state, [int? portionId]) {
     return showModalBottomSheet(
       useRootNavigator: true,
       context: context,

lib/features/diary/presentation/widgets/calendar_widget.dart

@@ -134,13 +134,13 @@ class _CalendarWidgetState extends State<CalendarWidget> {
     );
   }
 
-  _nextCalendarFormat() {
+  void _nextCalendarFormat() {
     setState(() {
       _calendarFormat = CalendarFormat.values[(_calendarFormat.index - 1) % CalendarFormat.values.length];
     });
   }
 
-  _arrowDown() {
+  GestureDetector _arrowDown() {
     return GestureDetector(
       behavior: HitTestBehavior.translucent,
       onVerticalDragStart: (_) {

lib/features/diary/presentation/widgets/calories_chart_widget.dart

@@ -242,7 +242,7 @@ class CaloriesChartWidget extends StatelessWidget {
     );
   }
 
-  _chartData(String title, String value) {
+  Row _chartData(String title, String value) {
     return Row(
       mainAxisAlignment: MainAxisAlignment.spaceBetween,
       children: [

lib/features/diary/presentation/widgets/glossary_moderation_request_modal_widget.dart

@@ -46,7 +46,7 @@ class _GlossaryModerationRequestModalWidgetState extends State<GlossaryModeratio
     productNameController.text = widget.productName;
   }
 
-  _alert() {
+  Padding _alert() {
     return Padding(
       padding: const EdgeInsets.all(16),
       child: Column(
@@ -137,7 +137,7 @@ class _GlossaryModerationRequestModalWidgetState extends State<GlossaryModeratio
     );
   }
 
-  _success() {
+  Padding _success() {
     return Padding(
       padding: const EdgeInsets.all(16),
       child: Column(
@@ -189,7 +189,7 @@ class _GlossaryModerationRequestModalWidgetState extends State<GlossaryModeratio
     );
   }
 
-  _addNewGlossaryProduct() {
+  Padding _addNewGlossaryProduct() {
     return Padding(
       padding: const EdgeInsets.all(16),
       child: Column(

lib/features/diary/presentation/widgets/photo_gallery_widget.dart

@@ -34,7 +34,7 @@ class _PhotoGalleryWidgetState extends State<PhotoGalleryWidget> {
     diaryCubit = context.read<DiaryCubit>();
   }
 
-  showImagePicker(DiaryDayModel diaryDay) {
+  void showImagePicker(DiaryDayModel diaryDay) {
     showCupertinoModalPopup<void>(
       context: context,
       builder: (context) {

lib/features/diary/presentation/widgets/product_widget.dart

@@ -44,7 +44,7 @@ class _ProductWidgetState extends State<ProductWidget> {
     isEaten = widget.portion.portionState == PortionState.eatenFromDiet ? true : false;
   }
 
-  updateProductInMeal(DiaryStateLoaded state, PortionModel portion) {
+  Future updateProductInMeal(DiaryStateLoaded state, PortionModel portion) {
     return showModalBottomSheet(
       useRootNavigator: true,
       context: context,

lib/features/diary/presentation/widgets/time_of_meal_picker_widget.dart

@@ -23,7 +23,7 @@ class _TimeOfMealPickerWidgetState extends State<TimeOfMealPickerWidget> {
     diaryCubit = context.read<DiaryCubit>();
   }
 
-  showTimePicker(int diaryId) {
+  void showTimePicker(int diaryId) {
     showModalBottomSheet<void>(
       context: context,
       useRootNavigator: true,

lib/features/diary/presentation/widgets/wakeup_and_retire_widget.dart

@@ -26,7 +26,7 @@ class _WakeupAndRetireWidgetState extends State<WakeupAndRetireWidget> {
     diaryCubit = context.read<DiaryCubit>();
   }
 
-  showTimePicker(int diaryId, bool isWakeup) {
+  void showTimePicker(int diaryId, bool isWakeup) {
     showModalBottomSheet<void>(
       context: context,
       useRootNavigator: true,